ws_hanging_close.js

var WebSocketServer = require('ws').Server
  , wss = new WebSocketServer({port: 8088})
  , _ = require("underscore");
 
var connections = [];
 
wss.on('connection', function(ws) {
    connections.push(ws);
    ws.on('message', function(message) {
        console.log('received: %s', message);
    });
    ws.send('something');
});

setTimeout(function() {
  console.log("closing sockets");
  _.each(connections, function(ws) { console.log("closing socket"); ws.close(); });

  console.log("closing server");
  wss.close();
}, 5000);

console.log("this server will shut down in 5s. please connect to it quickly.");